If you think it is sin, then to YOU it is sin. Others have freedom in Christ. So if you think merely reading about magic, NOT ACTUALLY ENGAGING IN IT, but just reading it, is sin, then to YOU it IS sin.
Can i read about Moses and Aaron and Pharaohs magicians without being tempted to become a sorcerer?
You seem to have made up your mind that you think Narnia is about promoting witchcraft (it isn't). There isn't much point in asking what others think if your mind is made up already.
You said you "watched Narnia". What do you mean? You watched the 2005 film -The Lion, The Witch and The Wardrobe?
No, but I saw a lot of occult creatures in it like Pan, but he was friendly in the episode.